Multiphase turbulent flow biological membrane sewage treatment system

Abstract

The utility model discloses a multiphase turbulent biological membrane sewage treatment system, which relates to the technical field of sewage treatment and comprises at least one sewage treatment tank, a filtering device and a standby tank, and an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank are sequentially arranged in each sewage treatment tank. The water outlet end of the anaerobic tank is connected with the water inlet end of the anoxic tank, the water outlet end of the anoxic tank is connected with the water inlet end of the aerobic tank, the bottom of the aerobic tank is communicated with the sedimentation tank, the filtering device is communicated with the sedimentation tank through a pipeline, and the standby tank is communicated with the sedimentation tank through a pipeline. Domestic sewage is subjected to nitrogen and phosphorus removal through the anaerobic tank, the anoxic tank and the aerobic tank, the domestic sewage subjected to nitrogen and phosphorus removal enters the sedimentation tank to be subjected to sedimentation treatment, and water suspended at the upper end of the sedimentation tank is output after being filtered by the filtering device, so that the purposes of protecting the rural water environment and improving the water quality are achieved. And the safety of drinking water in rural areas is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a multiphase turbulent flow biofilm sewage treatment system. Background Art

[0002] In rural areas, villages and residents are scattered, and sewage discharge is characterized by a wide and scattered discharge area. Moreover, domestic sewage in rural areas contains more nitrogen and phosphorus elements. If domestic sewage is not treated and converges into the natural water bodies of villages, it will exceed the purification capacity of natural water bodies, damage the rural living environment, and threaten the drinking water safety in rural areas.

[0003] Therefore, there is an urgent need to provide a domestic sewage treatment system to effectively treat sewage in rural areas and achieve the purpose of environmental protection. Summary of the Utility Model

[0004] An embodiment of the utility model provides a multiphase turbulent flow biofilm sewage treatment system, which can purify domestic sewage in rural areas, protect the rural water environment, and ensure the drinking water safety in rural areas.

[0005] An embodiment of the utility model provides a multiphase turbulent flow biofilm sewage treatment system, including:

[0006] At least one sewage treatment tank, an anaerobic tank, an anoxic tank, an aerobic tank, and a sedimentation tank are sequentially arranged inside each sewage treatment tank. The water outlet end of the anaerobic tank is connected to the water inlet end of the anoxic tank, the water outlet end of the anoxic tank is connected to the water inlet end of the aerobic tank, and the bottom of the aerobic tank is communicated with the sedimentation tank;

[0007] A filtering device, which is communicated with the sedimentation tank through a pipeline;

[0008] A standby tank, which is communicated with the sedimentation tank through a pipeline.

[0009] In some embodiments, a plurality of water collection components are continuously arranged in the sedimentation tank, a water collection trough is arranged in the middle of each water collection component, and after the plurality of water collection troughs are connected, they are connected to the filtering device through a pipeline.

[0010] In some embodiments, a cleaning pipe with a jet direction aiming at the water collection component is arranged above the sedimentation tank.

[0011] In some embodiments, dissolved oxygen meters are arranged in the aerobic tank at preset intervals.

[0012] In some embodiments, a plurality of aeration pipes extending to the bottom of the aerobic tank are arranged in each aerobic tank.

[0013] In some embodiments, the volume ratio of the anoxic tank to the anaerobic tank is 2:1, and the sewage flows in an S-shaped direction through the anaerobic tank and the anoxic tank.

[0014] In some embodiments, the aerobic tank surrounds the sedimentation tank.

[0015] In some embodiments, there are two sewage treatment tanks, and the two sewage treatment tanks are arranged symmetrically at intervals.

[0016] In some embodiments, a walkway board is provided above the two sewage treatment tanks and the spare tank, and upper and lower stairs are provided on both sides of the walkway board.

[0017] In some embodiments, the filtering device is a rotary drum vacuum filter.

[0018] The beneficial effects brought by the technical solution provided by the present utility model include:

[0019] An embodiment of the present utility model provides a multiphase turbulent biofilm sewage treatment system, which is provided with a sewage treatment tank, a filtering device and a spare tank. An anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank are sequentially arranged inside the sewage treatment tank. Domestic sewage realizes nitrogen and phosphorus removal through the anaerobic tank, the anoxic tank and the aerobic tank. After the domestic sewage after nitrogen and phosphorus removal enters the sedimentation tank for sedimentation treatment, the water suspended at the upper end of the sedimentation tank is filtered by the filtering device and then output. The output water already meets the discharge requirements in rural areas, achieving the purpose of protecting the rural water environment and ensuring the drinking water safety in rural areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of a multiphase turbulent biofilm sewage treatment system provided by an embodiment of the present utility model;

[0022] In the figure:

[0023] 1. Sewage treatment tank; 11. Anaerobic tank; 12. Anoxic tank; 13. Aerobic tank; 14. Sedimentation tank; 15. Water collection assembly; 151. Water collection tank; 16. Cleaning pipe; 17. Dissolved oxygen meter; 18. Aeration pipe

[0024] 2. Filtering device;

[0025] 3. Spare tank;

[0026] 4. Walkway board;

[0027] 5. Up and down stairs. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] The embodiments of the present utility model provide a multi-phase turbulent biofilm sewage treatment system, which can purify domestic sewage in rural areas, protect the rural water environment and ensure the drinking water safety in rural areas.

[0030] See Figure 1 As shown, the embodiments of the present utility model provide a multi-phase turbulent biofilm sewage treatment system, including: at least one sewage treatment tank 1, a filtering device 2 and a standby tank 3.

[0031] Inside each of the sewage treatment tanks 1, an anaerobic tank 11, an anoxic tank 12, an aerobic tank 13 and a sedimentation tank 14 are sequentially arranged. The water outlet end of the anaerobic tank 11 is connected to the water inlet end of the anoxic tank 12. The water outlet end of the anoxic tank 12 is connected to the water inlet end of the aerobic tank 13. The bottom of the aerobic tank 13 is communicated with the sedimentation tank 14. The filtering device 2 is communicated with the sedimentation tank 14 through a pipeline. The standby tank 3 is communicated with the sedimentation tank 14 through a pipeline.

[0032] Specifically, domestic sewage enters the anaerobic tank 11 and the anoxic tank 12. The domestic sewage forms a turbulent flow in the anaerobic tank 11 and the anoxic tank 12, and the fluid is in a turbulent flow state, enabling the sewage to be rapidly and fully mixed with the activated sludge inside. A biofilm that grows rapidly forms on the surface of the activated sludge, and the microorganisms in the biofilm utilize organic substances for metabolic activities, decomposing the organic substances into smaller compounds, such as denitrifying bacteria and anaerobic ammonium-oxidizing bacteria. The activated sludge and the shed biofilm in the anoxic tank 12 enter the aerobic tank 13 along with the domestic sewage. The activated sludge in the aerobic tank 13 can enrich a large amount of nitrifying bacteria and heterotrophic aerobic bacteria, converting ammonia nitrogen into nitrate nitrogen for degradation. The sewage undergoes nitrogen and phosphorus removal through the anaerobic tank 11, the anoxic tank 12, and the aerobic tank 13. After nitrogen and phosphorus removal, the domestic sewage enters the sedimentation tank 14 for sedimentation treatment. After the solid-liquid separation of the domestic sewage, the liquid is transported from the upper port of the sedimentation tank 14 to the filtration device 2 through a water pump for filtration and then output. The settled activated sludge sinks to the bottom of the sedimentation tank 14, and the activated sludge is output to the spare tank 3 through an air-lift sludge discharge device for recycling and standby for the next round of sewage treatment.

[0033] In the multi-phase turbulent biofilm sewage treatment system in the embodiment of the present utility model, it is provided with a sewage treatment tank, a filtration device, and a spare tank. Inside the sewage treatment tank, an anaerobic tank, an anoxic tank, an aerobic tank, and a sedimentation tank are sequentially arranged. The domestic sewage undergoes nitrogen and phosphorus removal through the anaerobic tank, the anoxic tank, and the aerobic tank. After nitrogen and phosphorus removal, the domestic sewage enters the sedimentation tank for sedimentation treatment. Then, the water suspended at the upper end of the sedimentation tank is filtered through the filtration device and output. The output water already meets the discharge requirements in rural areas, achieving the purpose of protecting the rural water environment and ensuring the drinking water safety in rural areas.

[0034] As an optional implementation manner, in an embodiment of the utility model, refer to Figure 1 As shown, a plurality of water collection components 15 are continuously arranged in the sedimentation tank 14. A water collection trough 151 is provided in the middle of each water collection component 15. After the plurality of water collection troughs 151 are connected, they are connected to the filtration device 2 through a pipeline. Generally, the water at the upper port of the sedimentation tank 14 still contains impurities. The water collection component 15 facilitates the water pump to transport the water at the upper port of the sedimentation tank 14 to the filtration device 2 for filtration. The filtered water already meets the discharge requirements in rural areas and can be used for irrigation needs in rural areas.

[0035] Optionally, the filtering device 2 is a rotary drum vacuum filter. The rotary drum vacuum filter has the following advantages: 1. High-efficiency filtration and small footprint: The rotary drum vacuum filter has high filtration efficiency and can process high sludge cakes. At the same time, it occupies a relatively small area and is suitable for various environments with space restrictions. 2. High degree of automation: The equipment has a high degree of automation, can perform multiple dehydrations, has a strong dehydration capacity, and is suitable for various sludge dehydration treatments. 3. Wide range of applications: The rotary drum vacuum filter has a wide range of applications and can process various sludge dehydrations to meet the needs of different fields. 4. Continuous automatic operation and large production capacity: The equipment can operate continuously and automatically, has a large production capacity, and is suitable for processing concentrated suspensions that are easy to contain filter particles. 5. Easy to realize automated operation and large processing capacity: The rotary drum vacuum filter also has the advantages of easy to realize automated operation and large processing capacity, and is suitable for slurries that are easy to filter.

[0036] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, a cleaning pipe 16 with a spray direction aimed at the water collecting component 15 is arranged above the sedimentation tank 14. The cleaning pipe 16 can regularly clean the water collecting component 15 to ensure the water collecting performance of the water collecting component 15 and extend the service life of the water collecting component 15.

[0037] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, each aerobic pool 13 is provided with a plurality of aeration pipes 18 extending to the bottom of the aerobic pool 13. The aeration pipes 18 convey air to the aeration device disposed at the bottom of the pool, and the air escapes in the form of bubbles, dissolving oxygen into the water at the gas-liquid interface, thereby increasing the dissolved oxygen content in the water, promoting the growth and activity of aerobic microorganisms, and accelerating the decomposition and transformation of organic matter.

[0038] Further, see Figure 1 As shown, a dissolved oxygen meter 17 is provided at a preset distance in the aerobic pool 13. An external control device can obtain the oxygen content in the aerobic pool 13 in real time through the dissolved oxygen meter 17, and then control the amount of air delivered to the aeration pipe 18 (which can be delivered by a blower), so as to achieve the purpose of accurately controlling the oxygen content in the aerobic pool 13 and ensure the growth and activity of aerobic microorganisms.

[0039] Optionally, the actual control device can adopt the Siemens S7-1500 series modules. Siemens S7-1500 is a powerful PLC controller with many advantages: 1. High performance and fast signal processing ability: S7-1500 adopts high-level system performance and fast signal processing technology, which can greatly shorten the response time and provide powerful control ability. The operation time of bit instructions can reach as fast as within 10 nanoseconds. 2. Powerful process control function: It supports the direct connection of analog drives, can realize the control of speed and positioning axes, and enables efficient and fast commissioning of drives and controllers. 3. Industrial information security integration: S7-1500 integrates the concept of industrial information security, extending from block protection to communication integrity, helping users ensure the security of applications. 4. Fault safety function: S7-1500 integrates the fault safety function and realizes fault-safe automation. The dissolved oxygen meter 17 can adopt the BDO-200A type dissolved oxygen meter, which can realize a highly intelligent on-line continuous monitor, can be equipped with polarographic electrodes, and automatically realizes wide-range measurement from ppb level to ppm level. It is a special instrument for measuring the oxygen content in liquids in industries such as boiler feed water, condensate water, and environmental protection sewage.

[0040] As an alternative implementation, in a utility model embodiment, refer to Figure 1 As shown, the volume ratio of the anoxic tank 12 to the anaerobic tank 11 is 2:1, and the sewage flows in an S-shaped direction when passing through the anaerobic tank 11 and the anoxic tank 12. Such an arrangement helps the domestic sewage to be fully treated anaerobically and anoxically.

[0041] As an alternative implementation, in a utility model embodiment, refer to Figure 1 As shown, the aerobic tank 13 surrounds the sedimentation tank 14, facilitating the sewage in the aerobic tank 13 to flow into the sedimentation tank 14 for sedimentation.

[0042] As an alternative implementation, in a utility model embodiment, refer to Figure 1 As shown, there are two sewage treatment tanks 1, and the two sewage treatment tanks 1 are arranged symmetrically at intervals. Such an arrangement can save space and reduce the cost of sewage treatment. Further, refer to Figure 1 As shown, a walkway board 4 is provided above the two sewage treatment tanks 1 and the standby tank 3, and upper and lower stairs 5 are provided on both sides of the walkway board 4, facilitating on-site operation by staff.

[0043] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. Unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] It should be noted that in the present utility model, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0045] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features of the present utility model.

Claims

1. A multiphase turbulent biofilm sewage treatment system, characterized in that Including: At least one sewage treatment tank (1), inside each of which there are successively arranged an anaerobic tank (11), an anoxic tank (12), an aerobic tank (13), and a sedimentation tank (14). The water outlet end of the anaerobic tank (11) is connected to the water inlet end of the anoxic tank (12), the water outlet end of the anoxic tank (12) is connected to the water inlet end of the aerobic tank (13), and the bottom of the aerobic tank (13) communicates with the sedimentation tank (14); A filtering device (2), which is communicated with the sedimentation tank (14) through a pipeline; A standby tank (3), which is communicated with the sedimentation tank (14) through a pipeline; A plurality of water collection assemblies (15) are continuously arranged in the sedimentation tank (14). A water collection trough (151) is arranged in the middle of each water collection assembly (15). After the plurality of water collection troughs (151) are connected, they are connected to the filtering device (2) through a pipeline. A water pump conveys the water at the upper port of the sedimentation tank (14) to the filtering device (2) through the water collection assembly (15) for filtration; A cleaning pipe (16) with a spraying direction aiming at the water collection assembly (15) is arranged above the sedimentation tank (14).

2. The polyphase turbulent flow biofilm sewage treatment system according to claim 1, characterized in that: Dissolved oxygen meters (17) are arranged in the aerobic tank (13) at preset intervals.

3. The multiphase turbulent biofilm sewage treatment system according to claim 1, characterized in that: A plurality of aeration pipes (18) extending to the bottom of the aerobic tank (13) are arranged in each aerobic tank (13).

4. The multiphase turbulent flow biofilm sewage treatment system according to claim 1, wherein: The volume ratio of the anoxic tank (12) to the anaerobic tank (11) is 2:1, and the sewage flows in an S-shaped direction when passing through the anaerobic tank (11) and the anoxic tank (12).

5. The multiphase turbulent flow biofilm sewage treatment system according to claim 1, wherein: The aerobic tank (13) is arranged around the sedimentation tank (14).

6. The multiphase turbulent flow biofilm sewage treatment system according to claim 1, wherein: There are two sewage treatment tanks (1), and the two sewage treatment tanks (1) are arranged symmetrically at intervals.

7. The multiphase turbulent flow biofilm sewage treatment system according to claim 6, wherein: A walkway board (4) is arranged above the two sewage treatment tanks (1) and the standby tank (3), and upper and lower staircases (5) are arranged on both sides of the walkway board (4).

8. The multi-phase turbulent biofilm sewage treatment system according to claim 1, characterized in that: The filtering device (2) is a rotary drum vacuum filter.

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